Units of Illumination
A foot-candle (sometimes foot candle; abbreviated fc, lm/ft², or sometimes ft-c) is a non-SI unit of illuminance or light intensity widely used in photography, film, television, conservation lighting, and the…
An Anatomy of a PIR Motion Detector for Alarm
There are so many passive infra-red motion detector in the market for alarm use, even I myself confused sometimes about the quality and functionalities of those units while their outdoor…
Overlook the importance of Security Lighting
Lighting is an overlook area for most people they build security systems. From a security perspective, two major purposes of lighting are to create a psychological deterrent to intrusion and…
What’s the Security Triangle
Detect, Delay and Response From the design perspective of security system, bear in mind the most basic objective of your setup is detect, delay and response. Without the proper addressing…
Nature barrier as the first line of defense
Perimeter Security Measures. A. Perimeter protection is the first line of defense in providing physical security for a facility. This can be accomplished by installing fences or other physical barriers,…
Design 1: An alarm system for protecting your premises from fire, water and intruder
You can have an isolated apartment, small house, cottage, and so on where you install some very expensive equipment for certain purpose; while it is located some remote areas and…
Different Kinds of Access Cards
Proximity card (or Prox Card) is a generic name for contactless integrated circuit devices used for security access. It can refer to the older 125 kHz devices or the newer…
How pet-immune motion detector works
Many people hesitate to purchase a home alarm, worried they may have to leave their family pet outside in order to arm their alarm system. The concern was that the…
CCD or CMOS Camera
Image sensor is the most important component for any CCTV security camera. This image sensor converts light into a digital signal. The two most basic types today are CCD (Charged…